Long story short, there are basically two revisions of the ATI R580 core. One is referred by the engineers as the R580"XL" and the other one is known as R580"PRO". Apparently, if you swap the BIOS on the cards, IT WILL NOT WORK. I just flashed Migou's R580"XL" version BIOS into my card, which is based on the R580"PRO" core, it fked up, and ATIFlash no longer recognizes the card.

If you still want to pursue the 16pp unlock, please post your dumped BIOS and I will mod it for you. If you want to mod it yourself see the X1800GTO @ X1800XT mod thread (See post number 7 on the first page). Works upon the same principle.

Before sending me the BIOSes, open the BIOS with Rabit and see if the Description says R580 "XL", if it does, don't bother. Make sure before sending me the BIOSes that the description says R580 "PRO" as shown below:

dolf said:

The dispute here remembers me my enthusiasm when I saw the RivaTuner core-register values which later on I realized are the same with the FUSE values in ATITool (W1zzard told me that it were "secret" up to that moment and reveals the combination for obtaining them - THANKS). These simple values (which was hard to understand in the begining are very reliable tool to estimate whether some core can be unlocked to 8, 12 or 16 pipes). Nowadays we know much more about the meaning of these values and knowing more I would like to help to all of you which are trying to unlock pipes on X1900GT. But you should know that most of the cores on these cards are with locked quads (on hardware level) and no BIOS flash can get them back. Otherwise these cores would be used for 16 pipe cards! Of course there will be unlockable cores in X1900GT family but they will be with limited number.

Everybody who want's to unlock pipes on X1900GT with BIOS modding MUST have unlockable core. Only then it is worth to search the BIOS for pipe number information (if we accept that isn't situated like in X1800 BIOS - 0x7B). But the unlocking of one X1900GT just confirms that. The only way to estimate the core unlocking potential now is the GB_PIPE_SELECT and we have to learn what the values mean.

I would join the efforts for unlocking of X1900GT if there is people which understand the above. All of you which will receive cards with unlockable cores GB_PIPE_SELECT=0x3FE4 should try the pipe mod (It should be successfull in 99%). If you can't unlock with these GB_PIPE_SELECT=0x3FE4 it means that the pipe number 1/2 bit is not situated in 0x7B and we have to look for other possibility.

Trying various BIOS modifications on locked (on hardware level) cores is waste of time

I modded this BIOS from the factory ATI cards, ie the ones from the ATI boxes, it shares the same pcb, but I do not know about the memory. Just make sure you are using Samsung 1.4ns chips and that they can clock up to 625 mhz. You may have noticed that the core is upclocked to 600 from 585.
TY very much for th hosting thing!

OOTay said:

nice work tofu! *high five*

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Thank you!

POGE said:

Can anyone verify this?

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Yes I'm anxious for another X1900GT owner to test this out. I'm thinking of emailing to one of those hardware review sites and have them do a review maybe.

W1zzard said:

does direct3d work after you modified the bios?

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Do you mean like ATITool artifact scan? Last time I checked, it was artifact free, and I played a coupla rounds of HaloCE and NFSU2, so Direct3D works? Yes I think so.

BTW, im at school right now, so ill post some results later. The only 3d benchie i have is 3dmark03, so LOL. And i'll post the artifact scan.

I have an HIS ATI Radeon X1900GT 256MB 256bit DDR3 and I will try your moded Bios this evening !

I have to check which memory i have on this card ...

You do a good job Tofu

With regards,

Migou

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Good Luck!!! To my knowledge, most of the X1900GT's use 1.4ns from Samsung.

hot fifty said:

in atiwinflash it says P/N mismatch. Please help

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I used ATIFlash, the DOS one. You can download this in the TechPowerUp! downloads section. When you do, place all the files onto a floppy or a usb boot drive. Fire it up and type atiflash -f -p 0 x19gtu.bin!!!

Hope this works out, and for all u ppl tryiong this.. good luck
Im still at school, so no results posted yet.